DragPartsUSA.com - Forged Crankshafts - BB Chevy

A cast iron crank may be fine for a mild performance build. But if big power is part of the plan, DragPartsUSA.com recommends a forged 4340 steel crank that will handle about as much power as your parts list can muster. Budget racers often push a cast crank's limits. When it comes to speed, it's a matter of how much you want to spend versus how much you want to push your luck.